Ulcerative Colitis is an inflammatory bowel disease (IBD). It causes inflammation and ulcers (sores) in the digestive tract. Ulcerative Colitis affects the innermost lining of the large intestine (colon) and the rectum. Symptoms usually develop over time, rather than suddenly. It can be debilitating and can sometimes lead to life-threatening complications. There is no known cure, but treatment can greatly reduce the signs and symptoms of the disease and even bring about long-term remission.